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Finding the Fourth Proportional to 325,539.60, 487,726.20 and 288,214.80

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Solution

The fourth proportional to 325,539.60, 487,726.20 and 288,214.80 is: 431,805.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,539.60 : 487,726.20 = 288,214.80 : x
  2. Step 2: Convert to fraction form
    325,539.60/487,726.20 = 288,214.80/x
  3. Step 3: Cross multiply
    325,539.60x = 487,726.20 × 288,214.80
  4. Step 4: Simplify right side
    325,539.60x = 140,569,909,187.76
  5. Step 5: Solve for x
    x = 140,569,909,187.76/325,539.60
  6. Step 6: Final answer
    x = 431,805.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.